From f7a498ccc3bcbf92cc1043b4d9ecf2f3091aae17 Mon Sep 17 00:00:00 2001
From: Paul Gascou-Vaillancourt <paul.gascvail@gmail.com>
Date: Tue, 23 Apr 2019 16:04:14 -0400
Subject: Add FriendlyWrap component

The FriendlyWrap component wraps text at specific places by
inserting a <wbr> element after each symbols occurence
---
 app/assets/javascripts/lib/utils/text_utility.js   |  8 +++
 .../vue_shared/components/friendly_wrap.vue        | 31 +++++++++++
 .../unreleased/10450-friendly-wrap-component.yml   |  5 ++
 spec/frontend/lib/utils/text_utility_spec.js       |  7 +++
 .../vue_shared/components/friendly_wrap_spec.js    | 63 ++++++++++++++++++++++
 5 files changed, 114 insertions(+)
 create mode 100644 app/assets/javascripts/vue_shared/components/friendly_wrap.vue
 create mode 100644 changelogs/unreleased/10450-friendly-wrap-component.yml
 create mode 100644 spec/frontend/vue_shared/components/friendly_wrap_spec.js

diff --git a/app/assets/javascripts/lib/utils/text_utility.js b/app/assets/javascripts/lib/utils/text_utility.js
index cc1d85fd97d..09d9ae35e70 100644
--- a/app/assets/javascripts/lib/utils/text_utility.js
+++ b/app/assets/javascripts/lib/utils/text_utility.js
@@ -192,3 +192,11 @@ export const truncateNamespace = (string = '') => {
 
   return namespace;
 };
+
+/**
+ * Escapes RegExp special characters
+ *
+ * @param {String} str
+ * @returns String
+ */
+export const escapeRegExp = str => str.replace(/[\\^$.*+?()[\]{}|]/g, '\\$&');
diff --git a/app/assets/javascripts/vue_shared/components/friendly_wrap.vue b/app/assets/javascripts/vue_shared/components/friendly_wrap.vue
new file mode 100644
index 00000000000..dfebd67c54a
--- /dev/null
+++ b/app/assets/javascripts/vue_shared/components/friendly_wrap.vue
@@ -0,0 +1,31 @@
+<script>
+import _ from 'underscore';
+import { escapeRegExp } from '../../lib/utils/text_utility';
+
+export default {
+  props: {
+    text: {
+      type: String,
+      required: true,
+    },
+    symbols: {
+      type: Array,
+      required: false,
+      default: () => ['/'],
+    },
+  },
+  computed: {
+    displayText() {
+      const appendWordBreak = (str, symbol) =>
+        str.replace(new RegExp(`(${symbol})`, 'g'), `$1<wbr>`);
+      return _.uniq(this.symbols)
+        .map(escapeRegExp)
+        .reduce(appendWordBreak, _.escape(this.text));
+    },
+  },
+};
+</script>
+
+<template>
+  <span class="text-break" v-html="displayText"></span>
+</template>
diff --git a/changelogs/unreleased/10450-friendly-wrap-component.yml b/changelogs/unreleased/10450-friendly-wrap-component.yml
new file mode 100644
index 00000000000..f10c15a2931
--- /dev/null
+++ b/changelogs/unreleased/10450-friendly-wrap-component.yml
@@ -0,0 +1,5 @@
+---
+title: Add FriendlyWrap component
+merge_request: 27600
+author:
+type: other
diff --git a/spec/frontend/lib/utils/text_utility_spec.js b/spec/frontend/lib/utils/text_utility_spec.js
index 0878c1de095..e31cbbaf99e 100644
--- a/spec/frontend/lib/utils/text_utility_spec.js
+++ b/spec/frontend/lib/utils/text_utility_spec.js
@@ -176,4 +176,11 @@ describe('text_utility', () => {
       });
     });
   });
+
+  describe('escapeRegExp', () => {
+    it('escapes regexp special characters', () => {
+      const str = '[\\^$.*+?()[]{}|]';
+      expect(textUtils.escapeRegExp(str)).toBe('\\[\\\\\\^\\$\\.\\*\\+\\?\\(\\)\\[\\]\\{\\}\\|\\]');
+    });
+  });
 });
diff --git a/spec/frontend/vue_shared/components/friendly_wrap_spec.js b/spec/frontend/vue_shared/components/friendly_wrap_spec.js
new file mode 100644
index 00000000000..170820dfadc
--- /dev/null
+++ b/spec/frontend/vue_shared/components/friendly_wrap_spec.js
@@ -0,0 +1,63 @@
+import { shallowMount, createLocalVue } from '@vue/test-utils';
+import FriendlyWrap from '~/vue_shared/components/friendly_wrap';
+
+const localVue = createLocalVue();
+
+describe('Friendly wrap component', () => {
+  let wrapper;
+
+  const createComponent = props => {
+    wrapper = shallowMount(FriendlyWrap, {
+      localVue,
+      propsData: props,
+    });
+  };
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('wraps text on slashes by default', () => {
+    const text = '/some/file/path';
+    const textWrapped = '/<wbr>some/<wbr>file/<wbr>path';
+    createComponent({
+      text,
+    });
+
+    expect(wrapper.text()).toBe(text);
+    expect(wrapper.html()).toMatch(textWrapped);
+  });
+
+  it('supports backslashes', () => {
+    const text = '\\some\\long\\file\\path';
+    const textWrapped = '\\<wbr>some\\<wbr>long\\<wbr>file\\<wbr>path';
+    createComponent({
+      text,
+      symbols: ['\\'],
+    });
+    expect(wrapper.text()).toBe(text);
+    expect(wrapper.html()).toMatch(textWrapped);
+  });
+
+  it('accepts multiple symbols', () => {
+    const text = 'some;text-that.needs;to-be.wrapped';
+    const textWrapped = 'some;<wbr>text-<wbr>that.<wbr>needs;<wbr>to-<wbr>be.<wbr>wrapped';
+    createComponent({
+      text,
+      symbols: [';', '-', '.'],
+    });
+    expect(wrapper.text()).toBe(text);
+    expect(wrapper.html()).toMatch(textWrapped);
+  });
+
+  it('works with words', () => {
+    const text = 'it goes on and on and on and on';
+    const textWrapped = 'it goes on and<wbr> on and<wbr> on and<wbr> on';
+    createComponent({
+      text,
+      symbols: ['and'],
+    });
+    expect(wrapper.text()).toBe(text);
+    expect(wrapper.html()).toMatch(textWrapped);
+  });
+});
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